From what I read the girl was a troublemaker. The teacher was on to her and called her bluff.
Now the parents are upset. Why don't they cooperate with the school and maybe this girl can be put back on the right path. The teacher has received some very good comments and support.
That's the trouble with the schools today-parents don't allow their children to be disciplined. If more teachers were like this one, there would be less problems in the schools.